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Q. No.Consider the given two statements:
Assertion (A):
Spraying juvenile conifers with GAs leads to early seed production.
Reason (R):
Spraying juvenile conifers with GAs hastens the maturity period.
1.
Both (A) and (R) are True and (R) is the correct explanation of (A).
2.
Both (A) and (R) are True but (R) is not the correct explanation of (A).
3.
(A) is True but (R) is False.
4.
(A) is False but (R) is True.
Subtopic: Gibberellin |
88%
From NCERT
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How many of the given statements are correct?
1. 1
2. 2
3. 3
4. 4
| I: | All Gibberellins are acidic. |
| II: | Gibberellins, cause a fruit like apple to elongate and improve its shape. |
| III: | Gibberellins delay senescence. |
| IV: | GA3 is used to speed up the malting process in brewing industry. |
1. 1
2. 2
3. 3
4. 4
Subtopic: Gibberellin |
79%
From NCERT
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How many of the given pairs are correctly matched?
1. Only I and II
2. Only I and III
3. Only II and III
4. I, II and III
| I: | Indole compounds : IAA |
| II: | Adenine derivatives : kinetin |
| III: | Derivatives of carotenoids : GA3 |
1. Only I and II
2. Only I and III
3. Only II and III
4. I, II and III
Subtopic: Growth Hormones & Auxin |
71%
From NCERT
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Consider the given two statements:
| Statement I: | In cotton, coriander and larkspur, the leaves of the juvenile plant are different in shape from those in mature plants. |
| Statement II: | In buttercup, shapes of leaves produced in air and those produced in water are different. |
| 1. | Statement I is correct; Statement II is correct |
| 2. | Statement I is correct; Statement II is incorrect |
| 3. | Statement I is incorrect; Statement II is correct |
| 4. | Statement I is incorrect; Statement II is incorrect |
Subtopic: Development |
95%
From NCERT
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What shaped curve is a characteristic of living organism growing in a natural environment?
1. S shaped
2. J shaped
3. Rectangular hyperbola
4. A straight line
1. S shaped
2. J shaped
3. Rectangular hyperbola
4. A straight line
Subtopic: Growth |
86%
From NCERT
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The given figure shows an experimental set up associated with the discovery of:
1. Auxins
2. Gibberellins
3. Cytokinin
4. Ethylene
1. Auxins2. Gibberellins
3. Cytokinin
4. Ethylene
Subtopic: Growth Hormones & Auxin |
99%
From NCERT
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A higher ratio of cytokinin in medium of tissue culture in plants:
1. induces growth of shoot buds
2. induces root formation
3. leads to death of cells in callus
4. leads to a decrease in cell division
1. induces growth of shoot buds
2. induces root formation
3. leads to death of cells in callus
4. leads to a decrease in cell division
Subtopic: Cytokinin |
88%
From NCERT
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Which of the following will be true for cells in the meristematic zone at root apex?
1. Only I
2. Only II
3. Both I and II
4. Neither I nor II
| I: | They are rich in protoplasm, possess large conspicuous nuclei. |
| II: | Their cell walls are primary in nature, thin and cellulosic with abundant plasmodesmatal connections. |
1. Only I
2. Only II
3. Both I and II
4. Neither I nor II
Subtopic: Growth |
91%
From NCERT
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Regarding conditions of growth in plants:
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
| I: | Water provides the medium for enzymatic activities needed for growth. |
| II: | Oxygen helps in releasing metabolic energy essential for growth activities. |
| III: | Nutrients (macro and micro essential elements) are required by plants for the synthesis of protoplasm and act as source of energy. |
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
Subtopic: Growth |
93%
From NCERT
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Identify the incorrect statement:
| 1. | Cytokinins were discovered as kinetin (a modified form of adenine, a purine) from the autoclaved herring sperm DNA. |
| 2. | Kinetin occurs naturally in plants. |
| 3. | Natural cytokinins are synthesised in regions where rapid cell division occurs. |
| 4. | Cytokinins help overcome the apical dominance. |
Subtopic: Cytokinin |
99%
From NCERT
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